Power supply



FIG. 1 is a front perspective view of a power supply;

FIG. 2 is a front elevational view of the power supply of FIG. 1;

FIG. 3 is a rear elevational view of the power supply of FIG. 1;

FIG. 4 is a left side elevational view of the power supply of FIG. 1;

FIG. 5 is a right side elevational view of the power supply of FIG. 1;

FIG. 6 is a top plan view of the power supply of FIG. 1; and,

FIG. 7 is a bottom plan view of the power supply of FIG. 1.

The broken lines having consistent dash lengths (dash-dash-dash) show unclaimed portions of the power supply in FIGS. 1-7 and form no part of the claimed design. 

CLAIM The ornamental design for a power supply, as shown and described. 